*{
    margin: 0px;
    padding: 0px;
}
.container{
    margin: 0px auto;
    width: 600px;
    height: 400px;
    overflow: hidden;
    position: relative;
    margin-top: 20px;
    border: 1px solid;
}
.container .wrap{
    width: 3600px;
    height: 400px;
    position: relative;
}
.container .wrap img{
    float: left;
    width: 600px;
    height: 400px;
}
.container .buttons{
    position: absolute;
    left: 250px;
    top: 350px;
    z-index: 1;
}
.container .buttons span{
    display: inline-block;
    width: 30px;
    height: 30px;
    text-align: center;
    line-height: 30px;
    background-color: rgb(127,255,138);
    border-radius: 50%;
    cursor: pointer;
}
.container .buttons .on{
    background-color: red;
}
.container .arrow{
    margin: 0px auto;
    position: absolute;
    left: 0px;
    top: 175px;
    z-index: 2;
    display: none; 
}
.container .arrow a{
    display: inline-block;
    width: 50px;
    height: 50px;
    text-align: center;
    line-height: 50px;
    background-color: rgb(0,255,255);
    border-radius: 50%;
    font-size: 20px;
    text-decoration: none;
    color: #000;
}
.container .arrow .arrow_right{
    margin: auto 0px auto 490px;
}